HEAT EXCHANGE SURFACE Russian patent published in 1999 - IPC

FIELD: heating engineering. SUBSTANCE: heat exchange surface has outer or inner heat-transfer elements or both inner and outer heat-transfer elements; it may be also provided with protective elements connected with heat-exchange surface by means of magnetic materials. heat-transfer elements, auxiliary heat-exchange elements or protective elements are made in form of fins, turbolators, rough surface or cover plates. Heat-transfer elements, auxiliary heat-exchange elements or protective elements are magnetic. Magnetic materials are made in form of continuous or discrete layers. Outer and inner heat-transfer elements, auxiliary heat-exchange elements or protective elements are located by opposite poles towards each other. EFFECT: fast securing and replacement of heat-transfer elements. 5 cl, 8 dwg